ICD10

ICD-10 Code M40: Kyphosis and lordosis

M40 is an ICD-10 diagnosis entry used to group records related to Kyphosis and lordosis. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the musculoskeletal system and connective tissue (M00-M99).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the musculoskeletal system and connective tissue (M00-M99).

When is it used?

  • May be used when a clinician documents kyphosis and lordosis in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
  • This entry may represent a broader category rather than the most specific billable code.

Code hierarchy

chapter
13Diseases of the musculoskeletal system and connective tissue (M00-M99)
block
M40-M54Dorsopathies
block
M40-M43Deforming dorsopathies
currentM40-M43

Official coding notes

Applicable to
  • underlying disease
Excludes1 (do not code together)
  • congenital kyphosis and lordosis (Q76.4)
  • kyphoscoliosis (M41.-)
  • postprocedural kyphosis and lordosis (M96.-)
Code first
  • underlying disease

Where you may see this code

You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.

Related specialists

Orthopedic SpecialistRheumatologist

Coding guidelines

Compatibility

Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
M40

Common synonyms

Kyphosis and lordosis

Frequently asked questions

Code details

CodeM40
SystemICD10
Display nameKyphosis and lordosis
ChapterDiseases of the musculoskeletal system and connective tissue (M00-M99)
BlockDeforming dorsopathies

Flags

BillableNo
Valid clinical useNo

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code M40 for Kyphosis and lordosis | HealthAssure